Grinding mill



(No Model.) 3 Sheets-Sheet 1. H. CUTLER.

GRINDING MILL. No. 348,384. Patented Aug. 31, 1886.

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H. CUTLER.

GRINDING MILL.

' No. 348,384. Patented Aug. 31, 1886.

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(No Model.) 3 Sheets-Sheet 3. H. CUTLER.

GRINDING MILL. No. 348,384. Patented Aug. 31, 1886.

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UNITED STATES PATENT OFFICE HENRY CUTLER, OF NORTH VILBRAHAM, MASSACHUSETTS, ASSIGNOR TO HENRY \VILLIS CUTLER, OF SAME PLACE.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 348,384, dated August 31, 1886.

Application filed December 9, 1885. Serial No. 1F5,188. (No model.)

To all whom it may concern.-

Be it known that I, HENRY CUTLER, of North Vilbraham, in the county of Hampden and State of Massachusetts, have invented a new and improved Grinding-Mill, of which the following is a full, clear, and exact description.

Vertical-disk grinding-mills are for many purposes superior to the ordinary form of horizontal-disk mills; but such vertical mills have not been generally adopted, because of the many defects in their construction. A principal defect is that heretofore these mills have not been been supplied with any suitable stopping or starting device.

The nature of my invention consists of the combinations of parts, including their construction, substantially as hereinafter set forth, and pointed out in the claims.

Reference'is to be had to the accompanying drawings, forming a part of this specilication, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side view of my improved grinding-mill. Fig.2 is a plan view of the same. Fig. 3 is a vertical sectional view taken on line at m of Fig. 2. Fig. 4 is an enlarged view of the stationary stone, the mill being shown in section. Fig. 5 is an enlarged view of a portion of the stationary stone and one of its supporting devices. Fig. 6 is an enlarged elevation of one of the trunnion-boxes, showing its base and boss. Fig. 7 is a view of the under side of the same. Fig. 8 is a sectional plan view of the spirally-grooved sleeve and attachment by which the runningstone is thrown back from the stationary stone. Fig. 9 is a sectional view of the same. Fig. 10 is a view of the agitator and its operating mechanism.

Referring now to the general construction, as best illustrated in Figs. 1 and 2, A is the base or bed of theinill, which bed is provided with two vertical standards, 13 B, formed with hearings in their upper ends, in which the trunnions O O of the mill-case D are mounted. This mill-case D is made in the ordinary manner to form a short cylindrical covering for the stones, and is provided with four equidistant outside flanges.

The stationary stone E, which is best seen in Figs. 3 and 4, is provided with four radial trunnions, b I), placed at equal distances in the periphery of the stone and extending through apertures in the case. These trunnions ride in boxes F, (see Figs. 5, 6, and 7,) each being formed with a base, 0, and a boss, d, which projects from the base in a line at right angles to the general line of the box. The flanges a a of the case D are slotted, as shown at c, and in these slots the bosses d are fitted, the under side of each base 0 being held against the face of the flange by a tap-bolt, f, which is passed through a washer, g, and engages with a threaded socket formed in the boss d. In practice I prefer that two of the trunnions b should be in a vertical plane, while the other two are in a horizontal plane, so that when it becomes necessary to adjust the stationary stone, in order to bring it into proper alignment with the running -stone G, mounted in a manner to be hereinafter described, it is simply necessary to loosen the bolts f of the boxes of the trunnions in order that the stone may be left free to turn upon said trunnions; and it will be easily understood, when the stationary stone is hung in this way, that as it changes position in coming to alignment with the running-stone vertically, the trunnions b, that are in the horizontal plane, will turn in their boxes, while the trunnions that are in the vertical plane will slide in their boxes endwise, the boxes turning somewhat on the bosses d. In aligning horizontally the reverse of this takes place-that is, the vertical trunnions will turn, and the horizontal trunnions will slide,i11 their respective boxes. During these movements the center of the stationary stone will not be changed from the center line of the shaft the bearings of which have a rigid connection with the case. In this way a very accurate and nice adjustment of the stones may be obtained, and when the alignment is correct and the running-stone bearing fairly against the stationary stone the bolts f are to be tight ened again.

In order that the stationary stone may be kept in place when being adjusted upon its trunnions, I provide a circular bar, J, which extends outward in front of the mill and is secured by bolts to the ends of the horizontal trunnions. This bar J bears upon a roller, J which is carried by a rigid arm, J, that projects forward from the bracket 1' of the millcase D, such arrangement affording a fixed point against which the stationary stone rests when being forced into alignment. The shaft H,upon which the ru-nni'ng-stone-G is mounted, rests in bearings h h, the bearing h being carried by the bracket i, above referred to, which projects from the front of the mill-case D, while the bearing h is carried by a bar, 70, supported by arms j j, which project from the rear of said case. The shaft H carries afixed pulley, K, which is preferably formed with a high crown.

From the foregoing description it will be seen that the stones, 1nill-case,pu=lley, and driving-shaft are mounted so that they are free to 3 swing in the same direction at the same time upon the trunnions 'O C.

In order that the frame, in which the par-ts named are arranged may be adjusted as the? necessities of the case require, I providesuch adjustable mechanism as will now be specifically described. To the bed A there is-fixed a transverse crank-shaft, Z, to oneend of which there is fixed a lever-arm, m, and a ratchet-ii wheel, at, which is engaged by a pawl, 0. The upper link, 0, of atoggledever, P, is pivotally connected to the cross-bar is directly beneath the bearing h, while thelowerlink, 2, ispivetfrom the case D. This shaft 0. is broken at about the point I), the approaching ends being threaded to engage with a double or right and left hand threaded nut, B. One of the arms a? is provided with asleeve, 0, through which the shaft a passes. A second sleeve, d, formed with a spiral groove, 6, is pinned or keyed to the shaft 0/- in position to overlap the sleeve 0, which sleeve is provided with projecting pins f, which ride in the groove 6' of the sleeve d.

In order that the runningstone may be yieldingly held adjusted to the stationary stone, the nut c is loosened or tightened to regulate the tension of the spring 0. In accordance with the direction in which it is desired to adj ust the running-stone when grinding, movement is imparted to the opposite end of the bar N by means of the nut R, and

1 when it is desired to throw the running-stone back and away fromithe stationary stone and out of contact therewith the sleeve (1 is thrown over by means of its handle d thus moving the bar a in thedirection of the arrow and at the sametimepartiall y rotating the bar, which partial rotation of the bar stops the motion of the agitator 9, said agitator being attached to the shoe gflwhich is hung, in the usual manner, beneath the hopper T. As is best shown in Figs. 1, 2, and 10, the agitator gis connected by means of a spring, h, and a strap, If, to abobally-connected to the'bed A, thecentral joint of a the-toggle-lever being'connected to the crank r of the shaft lby means of the link q, so that as the'crank-arm m is turned in the direction of the j arrow shown in Fig. 1 the rear of the shaftH; will he' 'lowered, thereby slacking off the'beltf Land stopping the mill, while, if the lever m is thrown in the opposite direction, the shaft, and pulley will be raised and the belttight-= ened, so as to drive the pulley forward and start the mill.

In order that the runningstone G may be held to its work, butat the same time be freel to recede from the stationarystone should any 2 hard substance such as iron accidentally pass between the surfaces ofthe stones, I provide such mechanism as will-now be described. I

Uponone end of the shaft H, I form a fixed collar, s, back of which there is placed a loose collar, .9, through which passthe bolts H, by

which-the collar is held to the horizontal step or'block M, against-which the end of the shaft abuts, said step being connected to a bar, N,

mounted,as will be presently described, by a stirrup, -u,which is provided with a cross-arm,

u, mounted in bearings u, carried by the bar N, the connection-between the step Mv and the stirrup u beingformed-by means of pivot-pins,

as at u. 'Oneend of the bar N is supported by a short rod, 1;, which passes through the bar 70, its projecting end being provided with a spiral spring, '0, while the innerend of the rod is threaded to engage with the nut v, a; second nut, 0 being arranged upon the rod '0 on the outer side of the bar 70. The other end of the bar Nis supported by a shaft, a, which bin, S, which is carried by the shaft a, so that as the shaft a is turned over toward the millcase the strap 11 will be unwound and the agitator allowed to fall back from the shaft H, which carries a cam-face, 7?.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a mill-case havtrunnions b, of boxes F, formed with bases 0, and bosses d, washers g, and tap-bolts f, substantially as described.

2. In a vertical-disk grinding-mill, the combination, with the casing D, provided with flanges a a, slotted at e e, of a stationary stone provided with trunnions, and boxes formed with bosses which enter and are held in the slots formed in the flanges of the mill-case, substantially as described.

3. Inavertical-disk grinding-mill,tl1e-combination, with a mill-case formed with trunnions and provided'with arms, brackets, and bearings, of the driving-shaft, its pulley, and adjusting devices, whereby the mill-case and its connections are tilted, substantially as described.

4. In a vertical-disk grinding-mill, the comnions and provided with arms, brackets, and bearings, of the driving-shaft, its pulley, and adjusting devices consisting of the toggle-lever 1?, link q, crank-shaft Z, and lever m, substantially as described.

5. In avertical-disk grinding-mill, the com bination, with the ease D, provided with is carried by projecting arms aflwhich extend ing slotted flanges, and a stone having the IIO bination, witha mill-case formed with trunflanges a a, slotted at c e, of the stationary stone provided with trunnions, the boxes secured to the flanges a, a circular bar, J, carried by the horizontal trunnions, a roller, J and an arm, J, substantially as described.

6. In avertical-disk grinding-mill, the combination, with the mill-case, running and stationary stones, of the shaft H, mounted in bearings supported by the mill-case and formed with a collar, 8, a step, M, loose collar 8', and bolts 25 15, substantially as described.

7. In a vertical-disk grinding-mill, the combination, with the mill-case, the stones, and shaft-supporting frame, of the shaft H, formed with collar 8, loose collar 3, bolts t t, step M, stirrup u, arm a, bar N, and eyes 20 substantially in the manner described.

8. In a vertical-dislc grinding-mill, the 00111- bination of the following elements, viz: millcaseD, stones E and G, shaft H, bearings h h, collars s and 8, bolts it, step M, stirrup u, arm

a, bar N, eyes u, rod 2;, spring 1), nuts 12 v", and a shaft, a, substantially as described.

9. In a vertical-disk grinding-mill, the combination, with the main driving-shaft, of the shaft a, the sleeve 01, secured to said shaft a and provided with the spiral groove 6, and handle W, the sleeve 0, provided with pins f, projecting therefrom and entering the groove 6', and a suitable connection between the main driving-shaft and the shaft a, substantially as set forth.

10. In a vertical-disk grinding-milhthe combination, with the mill-case, stones, the main driving-shaft, and means for supporting the same, of the two-part shaft a, nut R, bar N,

rod 21, and spring 12', substantially as described.

HENRY CUTLER.

XVitnesses:

J. A. PARKER, WILLIAM Y. BRUCE. 

